AirHint found the following cheapest return flights from Lisbon (LIS) to Mexico City (MEX) in December 2025 (see full year).

Return flights

11 Dec - 31 Dec	United
10 Dec - 31 Dec	United
04 Dec - 07 Dec	United
04 Dec - 09 Dec	United
15 Dec - 30 Dec	United
15 Dec - 22 Jan	United
10 Dec - 31 Jan	United
15 Dec - 31 Jan	United
16 Dec - 17 Jan	United
16 Dec - 14 Jan	United
13 Dec - 16 Dec	United
24 Dec - 19 Jan	Air Canada
24 Dec - 14 Jan	Air Canada
15 Dec - 08 Jan	United
03 Dec - 10 Dec	Air France
03 Dec - 13 Dec	Virgin Atlantic
25 Dec - 15 Jan	Air Canada
25 Dec - 14 Jan	Air Canada
06 Dec - 13 Dec	United
02 Dec - 09 Dec	Air Canada

Also check the deals for one-way flights from Lisbon to Mexico City in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Lisbon to Mexico City in December from 732€

Return flights